筝形的性质 by Rosalie83

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(xAxis) → C
3. Line(A, C) → a
4. Polygon(A, B, C) → poly1, c, a_1, b
5. Mirror(A, b) → A'
6. Mirror(B, b) → D
7. Mirror(C, b) → C'
8. Polygon(A', D, C') → poly1', c', a', b'
9. Polygon(A, B, C, D) → poly2, a_2, b_1, c_1, b'_1
10. Angle(A, B, C) → α
11. Angle(C, D, A) → β
12. Angle(D, A, B) → γ
13. Angle(B, C, D) → δ
14. Segment(A, C) → f
15. Line(B, D) → g
16. Line(A, C) → h
17. Intersect(a, g) → D_1
18. Segment(B, D_1) → i
19. Segment(D_1, D) → j
20. Segment(A, D_1) → k
21. Segment(D_1, C) → l
22. Segment(B, D_1) → m
23. Segment(D_1, D) → p
24. Segment(D_1, A) → q
25. Angle(C, D_1, B) → ε
26. Angle(B, D_1, A) → ζ
27. Angle(A, D_1, D) → η
28. Angle(D, D_1, C) → θ
29. Angle(D_1, B, C) → ι
30. Angle(C, D, D_1) → κ
31. Angle(D_1, D, A) → λ
32. Angle(D, A, D_1) → μ
33. Angle(D_1, A, B) → ν
34. Angle(A, B, D_1) → ξ
35. Angle(B, C, D_1) → ο
36. Angle(D_1, C, D) → ρ
37. Segment(B, D) → s